After applying the Version 2 patch I'm having a problem with the patch where it seems that
saveBilling() is returning 500 server error on checkout.
This is onepage checkout and I do use PayPal plus if that matters.
When I look at the form data the formkey value is there. So the missing formkey issue doesn't seem to be related to that.
I can disable formkey requirement in the admin side and the problem remains.
My template DOES NOT HAVE any /checkout/ stuff in it, so there are no files to add the often mentioned formkey's too --- that I can find.
Previously mentioned solutions I've tried:
-- My template doesn't have a /checkout/ override so nothing to patch
Been through this thread a dozen times without success.
Any thoughts or suggestions would be greatly appreciated.
*** Update ****
I've chased the problem down to the following:
Call to undefined method Mage_Checkout_OnepageController::isFormkeyValidationOnCheckoutEnabled();
* I found this function in Action.php *
Any thoughts on why they undefined method call occurring.